I wonder whether the courts might conclude that restrictions on cosmetic features . . .

I don't believe that most of what are often described by our side as cosmetic features are cosmetic in the least. Pistol grips, flash hiders, and telescoping stocks all serve important roles in the functionality of a weapon. The facts have been twisted and convoluted enough to where the ability to better control a weapon is actually argued to be a bad thing.

We shouldn't euphemize these features one bit. Such performance characteristics are intrinsic to the design of the weapon, and essential for the weapon to perform as intended. They don't make it more lethal. On the contrary, by increasing the ability to control the weapon, they make it less indiscriminate.